Australia's drug regulator has issued a safety warning over the medicine Phenergan and related products containing the antihistamine drug promethazine. The Therapeutic Goods Administration said ...

Codeine phosphate 10mg, promethazine HCl 6.25mg; per 5mL; syrup; contains alcohol 7%. Risk of life-threatening respiratory depression and death related to ultra-rapid metabolizers of codeine (esp.

The pharmacokinetics of promethazine administered in oral syrup and rectal suppositories were highly variable, but, in general, the suppositories produced a lower C max and later t max than the syrup.